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Double-talk detector suitable for a telephone-enabled PC

Telephonic communications – Echo cancellation or suppression – Using digital signal processing
Reexamination Certificate

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Doubletalk detection by means of spectral content

Telephonic communications – Echo cancellation or suppression
Patent

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Dual echo canceller and method for increasing dynamic range...

Telephonic communications – Echo cancellation or suppression
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Dual echo canceller with fast reflector identification

Telephonic communications – Echo cancellation or suppression – Using digital signal processing
Reexamination Certificate

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Dynamic allocation of resources for echo cancellation

Telephonic communications – Echo cancellation or suppression – Disable or inhibit function
Reexamination Certificate

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Dynamic attenuation method and apparatus for optimizing...

Telephonic communications – Echo cancellation or suppression – Using digital signal processing
Reexamination Certificate

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Dynamic balance control for telephone

Telephonic communications – Echo cancellation or suppression – Disable or inhibit function
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Dynamically estimating echo return loss in a communication link

Telephonic communications – Echo cancellation or suppression
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